peters



i' i Si* i Hamai meg/@2W (title. if www JAMES "MONTGOMERY, OF OROTONLANDING, YORK. Letters Patent No. 83,196, :lated October 20, 1868;a/n-tedated Octoberl 10, 1868.

The Schedule referred tain these Letters Patent and making part of theIlma.

To all whom it ma/y concern:

Be itknown that I, J AMES MONTGOMERY, of Oroton Landing, in the countyof Westchester, and State ofc New York, have invented a new and' usefulImprovement in Beams and Girders, and in fiooring to be used therewithand I do hereby declare the following to be a full, clear, and exactdesciiptionof1 the. same, reference being had to the accompanyingdrawings, which are part of this specification.`

Figure l represents a transverse section of a Acompound girderillustrating my invention.

Figure 2 is a transverse section of a pair of joistbeams with flooringapplied.

Figure 3 is a side view of a portion of one of the beams shown in ig,=2.

Figure 4 is a transverse .section of a joist, illustrating a mode'fkeying flooring thereto.

Figure 5 is a transverse section illustrating a -modification in themanner of jointing together or assembling the beams.

Figure 6- is a transverse section of a girder, showing the end of v ajoistl or beam applied thereto.

The objects 'of `my invention are-- First, to so' construct iron orsteel beams and girders, that the principal weight of metal will belocated in points where the chief tensile and compressive forces. willbe sustained.

Second, to provide convenient means for assembling two or more beams orgirders,l in such a manner that tht?7 will mutually support each other.

hird, to provide means whereby flooring may be secured to beams withoutnails or bolts.

In the drawings, A A represent the heads or flanges of my improved beam,and B the web, which tapers in thickness from each head or flange towardthe centre, and isconnected to the heads by curved shoulders C C.` Bythispspecrfic form, I apply the greatest thickness of metal in partswhere thechief tensile and crushing strains are sustained, and thusproduce a beam which will aiibrd the greatest possible strength Withagiven weight of material.

D D representi'ibs or fianges for supporting the under i surface of theflooring F, as shown in figs. 2 and 4.

E and G are respectively tongues and grooves formed upon the edge of theheads or flanges A, to adapt the beams to mutually' support each otherwhen they are assembled together, as illustrated in iigs. 1, 2, and 4.

Each beam constituted of the parts A A, B, C C, D D, E, and G, l proposeto roll in one piece of iron or steel, by means ofsuitable machinery.

7Where additional strength is required, any number of beams may beplaced side by side, in the manner illustrated .in g. 2, and secured bybolts H passing through their webs B, from one side to another of theseries, or two, four, vor more beams may be placed one above another, asillustrated in fig. 1,.and secured by vertical bolts I. A cluster offour, or even two beams, assembled in this manner, will constitute agirder of great strength in proportion to its weight.

Fig. 3 illustrates my mode of applying the connecting-bolts H, Saidbolts being made ofthe required length, with two solid heads h h, ofoblong form, are passed through horizontal slots h', of such size andshape as just to vadmit the heads, and the bolt being then turnedone-quarter round, so as' to bring its heads It' at right angles to theslots h', the bolt will be firmly held in place, and by reason of theextremities of A the bolt-heads being made to rise up on thickerportions of the webs, will wedge or compress the beams together withgreatfo Forsecuring flooring to the beams without bolts, nails, orri'v'ets, I form, on the under surface of the planks F, recesses ofproper size to pass over the beamheads, and having moulded faces f f',which may be formed `by a rotary 'cutter to adapt the planks to fitagainst one edge and shoulder of the head.

K represents a key formed to fit on one side or face f of the recess,and on the other, the opposite edge and shoulder oi' the beam-head. Aseach plank is placed over the beams, it is slipped endwise until themoulded face f is brought home against the side of the head, and the keyK is then driven in to secure it.

In iig. 5, is shown a slight modification in the mode of forming thetongues and grooves to connect the beams, one halfof each tongue beingformed on the upper,

and the other half on the lower fiange of the beam,A

and so of thegrooves, to adapt the beams to fit together.

Lighter flooring may be secured by engaging under the edge of thebeam-head, as shown in g. 5, or engaging in the groove only, asillustrated by red lines in fig. 4.

Fig. G'illustrates a modification in the construction oi" the compoundgirders,the central flanges being extended horizontally to receive and.support the cross-beams B.

In practice, however, I prefer to form the ends of said cross-beam B',by means of suitable machinery, so as to adapt them to fit within theirregular-curve side of the girder, as illustrated in tig. l, so thatany lateral extension of the central flanges beyond the width shown iniig. ,l may be unnecessary.

My improvements in beamsv and ooring are applicable to marine as well asland architecture.

The compound -beams may be made to form tubes for the conduction of hotair, gas, water, or for domestic purposes, and it is my intention sotouse them.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is` f* 1. A beam or grder, formed with heads AA, eon- 3. I also claim the` flanges D, for supporting the yeted, byconverging shoulders C G, to a web, B, ooring F, in the mannerspecified. lich tapers from both heads towards its mid-With or 4. Incombination withzt beam or girder, constructed Lnsverse centre,substantially as and for the purpose as set forth -in the rst clause, Iclaim the bolt o1' key LpIzLDed. H hf, applied and operating asexplained 2. I further claim, joiuting together two o1 more of JAMESMONTGOMERY. y improved beams, in substantially the manner hereinWitnesses; scribed, so as to make them mutually support eaeh L E, MBOWEN, her. W. H. BRERETON.

